# NousResearch/hermes-agent · Per-request model override routing in API server

## Open now

- Nothing open on GitHub.

These issues and PRs concern adding or fixing support for per-request model overrides in the API server, via an X-Router-Model header or request body field, including coverage across all API paths and per-client routing rules.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 0 merged PR(s), 3 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.50`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #16216: \[Feature\]: Honor per-request model override from API server adapter (X-Router-Model header or request body)

## Prior & competing PRs

- **#16403: feat(api-server): honor X-Router-Model for per-request model override**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4a09b692ecc385ad48f00694a1e315b8eed120cd`, `#3176`
- **#19939: fix(api_server): respect per-request model override in all API paths**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#22825`
- **#39846: fix(api-server): honor per-request model overrides**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `4a09b692ecc385ad48f00694a1e315b8eed120cd`, `#3176`, `#16216`

## Fix status

- No merged fix on record.
- Subsystem: `gateway`